RU2260694C1 - Method for multi-layer extraction of extremely massive, more than 20- 30 meters, bed of coal by slanting layers in ascending order with full backfilling of extracted space - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: method includes cutting lavas along fall in descending groups in three layers, driving at some distance along cutting and ventilation sides if extraction field of vertical drifts between lower and upper field drifts, connected to lavas and lava cuts by slopes for letting down coal from cleaning pit into cutting drift and feeding backfilling material into extracted space of layers. Additionally two crossing diagonal furnaces are driven, breaking extraction field on four blocks, and drifts from upper ventilation-backfilling drifts. On right and left sides of drift two vertical slopes are driven, which are connected from above and from below by slanting slopes, positioned at 27° angle to drift. On cutting side of extracting field at 20 meters distance from each other layer cutting slopes are made to group of vertical slopes and drift fro letting down coal and feeding backfilling material into extracted space of layers, and on ventilation side of extracting field - downwards form slopes group to layer cut for letting down backfilling material into extracted space of layers. Each group consisting of drift with slopes, can be positioned at distance of 20 meters from each other.

EFFECT: higher efficiency, broader functional capabilities.

2 cl, 11 dwg

Description

The invention relates to the mining industry, namely to underground mining of coal.

There is a method of excavation of a powerful layer with two inclined layers, in which the gozenki go to the layers from the recoil horizon [1]. A disadvantage of the analogue is the impossibility of constructing gesenki for multilayer excavation of formations with a thickness of more than 20-30 m due to the shallow location of the field haulage drift.

The closest technical solution is the method of excavation of a 30-meter gently sloping layer in three descending groups of three inclined layers with a full laying of the mined-out space and with gozens placed from the clearings of the lava beyond the excavation field [2]. The disadvantage of the prototype is the large grinding of coal when dumping it into a long gesenk.

The basis of the invention is the task of creating a method for excavating a powerful, more than 20-30 m, coal seam using inclined layers and using conventional mechanized complexes and with reliable transportation of coal and filling material, which is cost-effective and characterized by environmental protection.

The essence of the invention lies in the fact that in the method of multilayer excavation of a powerful, more than 20-30 m, coal seam in inclined layers in an ascending order with a full laying of the worked out space, including cutting of lavas by falling in descending groups of three layers, sinking at some distance from the recoil and the ventilation sides of the excavation field of vertical gozenki between the lower and upper field drifts associated with lavas and cuts of lava slopes for lowering coal from the face to the discharge drift and feeding filling material to the worked out space of the layers, they additionally drive two intersecting diagonal furnaces, dividing the excavation field into four blocks, and the gesenki from the upper ventilation stowing drifts, while two vertical slopes pass on the right and left side of the gesenka, which are connected by inclined top and bottom slopes located at an angle of 27 ° to the gozenka, while on the recoil side of the excavation field at a distance of 20 m from each other pass layered glades to the group of vertical slopes and a gozenka for descent coal and feeding the packing material in the goaf layers, and side vent excavation field - ramps down from a group clearing layers for lowering the packing material in the goaf layers. Moreover, each group consisting of a gozenka with slopes is located at a distance of 20 m from each other.

The technical result of the invention is a significant reduction in the grinding of coal during descent along the gesenki.

The proposal is illustrated by drawings.

Figure 1 is a diagram of the formation; figure 2 is a plan of the mine field at the level of field workings of the soil of the reservoir, section I-I in figure 1; figure 3 is a plan of the mine field at the level of field workings of the roof of the reservoir, section II-II in figure 1; figure 4 is a vertical section of the excavation field along the lower boundary of the recoil horizon, section III-III in figure 2; figure 5 is a vertical section of the excavation field along the upper boundary of the ventilation horizon, section IV-IV in figure 2; 6 - node G of the excavation field in figure 4 is a vertical section at the level of the retreat horizon; Fig.7 - node F of the excavation field in Fig.5 is a vertical section at the level of the ventilation horizon; Fig.8 is a plan of the excavation field at the level of mining layer in the block DKC, section V-V in figure 4; Fig.9 is a cross section of the lava in the block DKC, section VI-VI in Fig.8; figure 10 is a cross section of the lower boundary of the lava in the block DKC, section VII-VII in Fig; 11 is a cross section of the upper boundary of the lava in the block DKC, section VIII-VIII in Fig.8.

Figure 1-3 shows the development of the autopsy scheme and two plans with it for the soil and roof of the formation at the level of field drifts: vertical stand and skip shafts 1, 2, flank ventilation shaft 3 of the right wing of the mine field, field recoil 4 and field supply 5 drift of the soil of the formation, field filling 6 and field filling and ventilation 7 drifts of the roof of the formation, boundary field supply and ventilation faults 8-11 on the soil and the roof of the formation.

Figure 4-7 shows two views of the excavation field from the side of the discharge and ventilation horizons with two detailed nodes, which show the diagonal intersecting furnaces 12-15, connecting slopes 19 and 20 on the discharge and ventilation sides of the excavation field, glade slopes 21 s glade 22 on the lower border 23 of lava 24, glade slopes 25 on glade 26 on the upper border 27 of lava 24. All gesenki and slopes connected by glades have running and cargo (or pipe) compartments. In Figs. 9-11, lava sections show a mechanized complex 28, a soft lava fence 29 from the worked out space, filling material 30, a support lining 31 on the return side of the lava, and a support lining 32 on the ventilation side of the lava. On the reservoir 33, Fig. 1, the removable layers 34 are shown, and Figs. 8-11 show the filling pipe 35 with a monitor 36 in the conveyor deck 22 and the filling pipe 37 with the monitor 38 in the ventilation slot 26.

The method is as follows.

After opening the heavy-duty formation, the central trunks 1 and 2 pass field haulage drifts 4 in the soil of the formation, and from it all other field workings 5-7 in the soil and the roof of the formation. Between field drifts 4 and 6, 5 and 7 are four mutually intersecting diagonal furnaces 12-15 on the recoil and ventilation sides of the excavation field. From field backfill 5 and ventilation and backfill 7 field workings in the roof of the reservoir and from diagonal furnaces, geese 16 and groups of slopes are cut, two on two sides of gesenks. Groups of slopes with a notch field are connected by layered notch slopes 21 and 25 on the discharge and ventilation sides of the notch field.

Coal mined in the lavas of the inclined layers 34 of the heavy-duty seam 33 enters the glade 22, then down the ramps 21 and 25 it descends to the gesenka 16 and is delivered to the haulage drift 4 and to the barrel 2. The filling material is delivered to the worked-out space of 30 layers in pipelines as with side of the retraction and ventilation horizons. On the downstream side, after the ventilation shaft 5, the boundary field working 4 and the backfill field drift 6, the backfill material in the pipelines descends along the runners 16 to the connecting ramps 19 and only then through the cut-out ramps of the return side of the extraction field it enters the worked out space of the layers. On the ventilation side of the excavation field, the filling material in the pipelines enters the ventilation-filling field drift 7 after the ventilation shaft and then descends into the gesenki 16 on the ventilation side of the excavation field, to the connecting slopes with a slope from the gozenki and then along the vertical groups of slopes to the glade 25, suitable to the roof of the glade 26 and into the worked-out space 30.

Since all gesenki and slopes have running compartments, glade slopes 21 and 25 are exits from the lava.

The presence of a group of slopes at a certain distance from the excavation field and the approach to the glades of layered glacial slopes every 20 m ensure the excavation of the formation of almost any thickness divided by inclined layers, in which serial mechanized complexes for medium-thick formations can be used, while the group of slopes used allows the delivery of coal and filling material anywhere in the reservoir by capacity.

Sources of information

1. Mashkovtsev I.L. Underground coal mining technology. - M.: Publishing House of UDN, 1982. - S.75-78.

2. Mashkovtsev I.L., Saumitra Narayan Deb. Environmental technologies for the development of powerful flat formations. - \ Coal \, No. 2, 2001 - S. 59-60.

Claims (2)

1. The method of multilayer excavation of a heavy-duty, more than 20-30 m, coal seam with inclined layers in ascending order with a full laying of the worked out space, including cutting of lavas by falling in descending groups of three layers, sinking at a certain distance from the return and ventilation sides of the vertical excavation field gesenok between the lower and upper field drifts associated with lavas and cuts of lavas with slopes for draining coal from the face into the haulage drift and feeding filling material into the worked out layer space, about characterized by the fact that they additionally drive two intersecting diagonal furnaces, dividing the excavation field into four blocks, and gesenki from the upper ventilation stowing drifts, while on the right and left side of the gozenka there are two vertical slopes that are connected from above and below by inclined slopes, located at an angle of 27 ° to the gozenka, while on the recoil side of the excavation field at a distance of 20 m from each other there are layered glide slopes to a group of vertical slopes and a gozenka for lowering coal and feeding for masonry material into the worked-out space of the layers, and on the ventilation side of the excavation field - down from the group of slopes to the layer clearing for lowering the filling material into the worked-out space of the layers. 2. The method of multi-layer excavation of a heavy-duty, more than 20-30 m, coal seam in inclined layers in ascending order with the full laying of the worked out space according to claim 1, characterized in that each group consisting of a gozenka with slopes is located at a distance of 20 m from friend.

Images